Introduction
Water is a universal solvent and may contain a wide diversity of substances arising from industrial, agricultural and other sources and from supply systems. Water, containing diverse substances, can be modified by treatment and storage. (Geno)toxicological safety of water, especially drinking water, represents an important issue for safeguarding of health and well- being of humans. It should be assumed that there is a potential for all members of population to be exposed to drinking water that might contain possible hazardous contaminants. Therefore, strict quality requirements should be set to protect public health. What is (geno)toxicity, what is risk, and what we wish to do or we are prepared to do about such risks, all these questions are the questions that arise when dealing with safety of the drinking water and which many researchers encounter.1,2,3 Epidemiological studies have shown that a correlation between genotoxicity of drinking water and increased cancer risks, exists.4,5,6,7